Fix Debian 8 acceptance nodeset

Author: tylerjl

spec/acceptance/nodesets/debian-8-x64.yml

@@ -5,12 +5,14 @@ HOSTS:
       - database
       - dashboard
     platform: debian-8-amd64
-    image: debian:8
+    image: debian:8.11
     hypervisor: docker
     docker_cmd: ["/bin/systemd"]
     docker_preserve_image: true
     docker_image_commands:
-      - echo 'deb http://ftp.debian.org/debian jessie-backports main' >> /etc/apt/sources.list
+      - echo 'deb [check-valid-until=no] http://archive.debian.org/debian jessie-backports main' >> /etc/apt/sources.list
+      - echo 'Acquire::Check-Valid-Until "false";' >> /etc/apt/apt.conf
+      - sed -i '/jessie.updates/d' /etc/apt/sources.list
       - apt-get update
       - apt-get install -yq -t jessie-backports openjdk-8-jre-headless
       - apt-get install -yq wget net-tools apt-transport-https